title: Rapid and Sensitive Detection of H1N1/2009 Virus from Aerosol Samples with a Microfluidic Immunosensor.
abstract: Influenza A H1N1/2009 is a highly infectious, rapidly spreading airborne disease that needs to be monitored in near real time, preferably in a microfluidic format. However, such demonstration is difficult to find as H1N1 concentration in aerosol samples is extremely low, with interference from dust particles. In this work, we measured Mie scatter intensities from a microfluidic device with optical waveguide channels, where the antibody-conjugated latex beads immunoagglutinated with the target H1N1 antigens. Through careful optimizations of optical parameters, we were able to maximize the Mie scatter increase from the latex immunoagglutinations while minimizing the background scatter from the dust particles. The aerosol samples were collected from a 1:10 mock classroom using a button air sampler, where a nebulizer generated aerosols, simulating human coughing. The detection limits with real aerosol samples were 1 and 10 pg/mL, using a spectrometer or a cell phone camera as an optical detector, respectively. These are several orders of magnitudes more sensitive than the other methods. The microfluidic immunosensor readings are in concordance with the results of reverse transcription polymerase chain reaction. The assay time was 30 s for sampling and 5 min for the microfluidic assay.
authors.affiliation: Department of Agricultural and Biosystems Engineering, University of Arizona, Tucson, AZ, USA McMaster University, Ontario, Canada.
authors.forename: Hyuck-Jin
authors.initials: HJ
authors.lastname: Kwon
authors.affiliation: Biomedical Engineering Graduate Interdisciplinary Program, University of Arizona, Tucson, AZ, USA.
authors.forename: Christopher F
authors.initials: CF
authors.lastname: Fronczek
authors.affiliation: Department of Agricultural and Biosystems Engineering, University of Arizona, Tucson, AZ, USA.
authors.forename: Scott V
authors.initials: SV
authors.lastname: Angus
authors.affiliation: Biomedical Engineering Graduate Interdisciplinary Program, University of Arizona, Tucson, AZ, USA.
authors.forename: Ariana M
authors.initials: AM
authors.lastname: Nicolini
authors.affiliation: Department of Agricultural and Biosystems Engineering, University of Arizona, Tucson, AZ, USA Biomedical Engineering Graduate Interdisciplinary Program, University of Arizona, Tucson, AZ, USA jyyoon@email.arizona.edu.
authors.forename: Jeong-Yeol
authors.initials: JY
authors.lastname: Yoon
mesh_terms: D000336:Aerosols / Q000737:chemistry; D000372:Agglutination Tests / Q000295:instrumentation*; D055910:Antibodies, Immobilized / Q000378:metabolism*; D000914:Antibodies, Viral / Q000378:metabolism*; D057205:Automation, Laboratory; D040421:Cell Phone; D003371:Cough / Q000821:virology*; D004784:Environmental Monitoring / Q000295:instrumentation*; D019267:Hemagglutinin Glycoproteins, Influenza Virus / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000302:isolation & purification* / Q000378:metabolism; D057230:Limit of Detection; D044085:Microfluidics / Q000295:instrumentation; D008863:Microspheres; D008904:Miniaturization; D015203:Reproducibility of Results; D013053:Spectrophotometry / Q000295:instrumentation; D014691:Ventilation
chemical_list: D000336:Aerosols; D055910:Antibodies, Immobilized; D000914:Antibodies, Viral; D019267:Hemagglutinin Glycoproteins, Influenza Virus
keywords: aerosol; cell phone camera; immunoagglutination; influenza A; liquid-core waveguide